Add btn btn-primary Bootstrap 5 classes for the Reorder Sections action button when editing layouts

Problem/Motivation

#3323177: Add the "Reorder sections" feature option to the list of actions for Drupal core Layout Builder editing
#3080606: [PP-1] Reorder Layout Builder sections

Proposed resolution

• Add btn btn-primary Bootstrap 5 classes for the Reorder Sections action button when editing layouts

Remaining tasks

• ✅ File an issue about this project
• ✅ Addition/Change/Update/Fix to this project
• ✅ Testing to ensure no regression
• ➖ Automated unit/functional testing coverage
• ➖ Developer Documentation support on feature change/addition
• ➖ User Guide Documentation support on feature change/addition
• ✅ Accessibility and Readability
• ✅ Code review from 1 Varbase core team member
• ✅ Full testing and approval
• ✅ Credit contributors
• ✅ Review with the product owner
• ✅ Update Release Notes and Update Helper on new feature change/addition
• ✅ Release varbase-10.0.0-alpha1, varbase_layout_builder-10.1.0-alpha1

Varbase update type

• ✅ No Update
• ➖ Optional Update
• ➖ Forced Update
• ➖ Forced Update if Unchanged

User interface changes

API changes

• N/A

Data model changes

• N/A

Release notes snippet

• Issue #3361944: Added btn btn-primary Bootstrap 5 classes for the Reorder Sections action button when editing layouts